Compound air-compressor



No. 624,998. Patented may I6, |899. G. w. wALLlcK.

COMPUUND AIR CUMPRESSOR.

(Application led Mar. 21, 1898.)

(No Model.)

NirED STATES PATENT FEICE.

GEORGE W. IVVALLICK, OF STURGIS, MICHIGAN.

CONI POUND AIR-COMPRESSOR.

SPECIFICATION forming 'part of Letters Patent No. 624,998, dated May 16,1899.

Application filed March 21, 1898.

To all whom it may concern:

`Be it known that I, GEORGE W. WALLICK, a citizen of the United States,residing at Sturgis, in the county of St. Joseph and State of Michigan,have invented new and useful Improvements in Compound Air-Compressors,of which the following is a full and correct description.

' This invention relates to improvements in air-compressorsy wherein theair-compressing pistons are reciprocally operated in their respectivecylinders by the action of a lever.

The object of my invention is to provide aV Y simple and effectiveair-compressor wherein by compound connections of the cylinders andpistons with the lever the power of the latter is multiplied andconcentrated where necessary.

To these ends my invention consists in the construction and combinationof parts hereinafter described,and indicated in the claims.

Reference is had to the accompanying drawings, forming a portion of thisspecication, and the letters of reference marked thereon.

Similar letters refer to similar parts in both drawings.

Figure l is a side elevation of the device. Fig. 2 is a longitudinalcross-section thereof, taken through the center of the cylinders.

A is a frame, which may be of any convenientform, to support theapparatus.

B is a lever operating the device, fulcrumed on the frame A by a bolt ctand is pivotally secured to a sleeve b, fastened on the hollowpiston-rod C, which operates a valvular piston c in a cylinder D.

E is a lever pivotally fulcrumed on a sleeve encircling a bolt d,whichis furnished with a head and nut and passes through both sidesI of frameA, forming a substantial bearing for E. The upper part of the lever Eterminates "encircling D and adjustable thereon.

in a jaw,which pivotally supports the cylinder D by the pins e,projecting from the clamp i T e lower end of E also terminates in ajaw,which is pivotally connected by the pin g to the solid piston-rod F,operating a solid piston r in cylinder G.

H is a iiexible tube connecting the cylinder G by the outlet-tube h tothe hollow pistonrod C by the inlet-tube t, secured thereto.

The clamp jencircles midwaythe cylinder Serial No. 674,716. (No model.)

G and is pivoted on the lower end of4 the lever B by the pin 7c,permitting the free oscillation of G.

I is an adjustable bar, the upper part forming a jaw pivotally connectedto the lever, E by the pins e. The lower part is pivotally attached tothe lever B below the fulcrum d by the pin Z. The adjustment of I iseffected by a screwbolt m, connecting the upper and lower parts thereof.

n is an outlet-valve from the cylinder D to connect with acompressed-air receiver by a flexible pipe o. An inlet-valve p is placedin the upper end of G, and an opening q is provided in the lower endthereof vfor the egress of air. j

In working the pumps C D and F G by operating the lever B backward thepiston r is pushed to the forward end of cylinder G. The air is therebyforced through the pipe H,the hollow piston-rod C, and valve-pistonthereon into the cylinder D by the movement of lever B pushing forwardcylinder G and at rod F bythe movement of lever E, attached thereto andactuated rby the bar I. On the forward stroke of the lever B the hollowpiston-rod C and the cylinder D are mutually drawn forward withmultiplied force by the compound power of'B, acting above and Vbelow itsfulcrum at a on both C and D simultaneously and with increased forcetoward the end of the stroke, causing the air collected in cylinder D,as already described, to be readily forced through the stop-valve n intoasuitable receiver. The forward movement of the lever B, just described,withdraws the piston rto the'lower end of cylinder G, whereupon the airenters therein through the stopvalve p and leaves a supply for the nextstroke. l

The object of the greater dimensionsl of the lower cylinder is to supplya large volume of air which is partially compressed when left in theupper cylinder, ready to be forced therefrom' by the powerful action ofthe lever B. The lever F. is adjustable by means of the clamp f,encircling D and movable thereon. A corresponding change can be made inthe bar l by the screw-bolt m. Adjustment of these parts maybe necessaryin different operations of the device.

IOO

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. In a compound air-compressor the cornbination with the cylinder Ghaving solid piston 1 and rod F and inlet check-Valve p, outlet-tube hand opening q the clamp j encircling cylinder G pivoted to lower end oflever B; a smaller cylinder D having hollow piston-rod C and valvularpiston c and inlettube 1l and outlet check-valve n, the adjustable clampf encircling cylinder D, of the lever E fulcrumed on frame A with theupper jaw connected to clamp f and supporting cylinder D, and the lowerjaw pivotally secured to piston-rod F, a flexible pipe II connectingcylinderG to piston-rod C substantiallyas set forth.

2. In a compound air-compressor the combination of a cylinder G havingsolid piston r and rod F, and clamp encircling cylinder G pivoted tolower end of lever B, a smaller cylinder D with hollow piston-rod C andvalvular piston c and outlet check-valve n, the adjustable clamp fencircling cylinder D the lever E fulcru med on frame A connecting thecylinderD with pistonrod F, and IieXible pipe H connecting the upper endof the cylinder G and the piston-rod O,With a lever B fulcrulned on theframe A by bolt a, and pivotally connected to sleeve b encirclingpiston-rod C, the adjustable rod I pivotally connected beneath thefulcrum a to lever B and to the upper jaw of lever E' whereby said leverE is operated, the several parts being arranged substan tially as andfor the purpose specified.

GEO. W. VALLICK. Witnesses:

GRANVILLE STOFFLET, E. W. PENDLETON, J r.

